Here's a few points we need to cover:
1. Should TNT be allowed (Through spawning, since there is no other way to get it)
2. Should tools be spawnable?
3. Should any other items that can't be obtained be allowed?
My opinion on these are that TNT should not be allowed (Too tempting for griefers and others *cough* you know who you are *cough*. And it isn't all that needed. Everything can be done without TNT. I also feel tools should be made, not spawned. I think everything should be made. Make the game challenging and entertaining (This would make it so people would have to be careful with their resources). I also don't think there is any other item that requires us to allow spawning. I think that no spawning once so ever is a good policy.
The only item that I think maybe should be allowed is TNT. But that's up to you guys.